Remove the battery for a minute or two, then reinsert it and reboot. If that doesn't work, you could try a different camera app to see if that will wake it up. If that fails a hard reset of your phone may get it back, but if after all that you don't succeed, you'll need to replace it under warranty.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.